Empidonax traillii, commonly known as the willow flycatcher, is a small passerine bird. It has a grayish-olive upper body, white underparts, and a white eye ring. Its wings are short and rounded, and its tail is long and square-tipped. It is found in open woodlands, riparian areas, and wet meadows in North America. Its lifespan is typically 3-4 years, and its current population is estimated to be around 1.5 million individuals.
Name Origin: The scientific name of this organism, Empidonax traillii, is derived from two Greek words. The first, "empidonax," is derived from the Greek words "empidos," meaning "gnat," and "anax," meaning "king." This is likely a reference to the small size of the organism. The second part of the name, "traillii," is in honor of the Scottish naturalist Thomas Stewart Traill, who first described the species in 1827.
Related Species: Contopus cooperi, Contopus virens, Empidonax difficilis, Empidonax flaviventris, Empidonax hammondii, Empidonax virescens